Traverse mechanism



July 8, 1952 G. B. cALvl TRAVERSE MECHNISM 4 Sheecs--Sheel l :Filed May3, 1948 EGE/VTS.

July 8, 1952 i G. B. CALVI 2,602,607

TRAVERSE MECHANISM Filed May 5, 1948 4 Sheets-Sheet 2 INVENTOH.

July 8 1952 G. B. CALVI 2,602,607

TRAVERSE MECHANISM Filed May 5, 1948 4 Sheets-Sheet 3 Ilm I l JNVENTQR.w1/1mm afisla Cal u July 8, 1952 G. B. cA| v| 2,602,607

TRAvERsE MECHANISM Filed May 5, 1948 4 sheets-sheet Patented July 8,1952 UNIT applicaties Mays, 194s, sensi Ns'. 24,804 Iny Italy May10,194?

The present invention relates to a mechanical device for distributingand winding yarn on botu tle bobbins or the like.

In the known devices meant for the same work, for the filling of thebobbins, the spoolers require apawl provided with a thread guide which,sliding on the same thread of the bobbin, displaces itself gradually,while another device causes alternating motions to the thread guide andtherefore provokes the formation of successive truncated cones of yarnon the l"bobbins The result is that, owing to the unavoidableirregularity of the winding tension of the yarn fed to the bobbin, theworking of said pawl is not always accurate and therefore an irregularwinding of the yarn on the bobbin takes place.

Moreover, in the known types, there is a further drawback when windingvery thin yarn, for instance silk, viz. it is necessary to keep a verylow winding speed, because otherwise the yarn breaks.

Moreover, in the known types, in order to take into account thedifferent winding diameter of the yarn during the successive rotationsof the bottle bobbin, it is necessary to provide a continuouslyoperative device by which, at every moment, the rotation speed of thebobbin is varied in order to keep constant the winding speed, in spiteof the continuous variation of the diameter according to which the yarnis wound up. The necessity for the continuous operation of this devicefurther necessitates a very low rotation speed of the bobbin.

rlhe device, according to the invention, eliminates all these drawbacksand presents at the saine time further advantages.

The mechanical device for distribution and windingof yarn according tothe present invention is characterised by the fact that, in addition toknown means for varying the speed transmitted between the motor and theprincipal member operated by it on the machine, there is provided amobile equipment continuously displaced in the direction of the axis orthe bobbin from its larger diameter to the smaller, a mecha' nisrn,provided with a thread-guide, carried by said mobile equipment, and withan alternating motion, in the saine direction of motion as the mobileequipment, and mechanical means for giving to said mobile equipment andto said 5 mechanism velocities exactly connected with each other and inprecise and mathematical reciprocal relation, as well betweenthemselves, as with the rotation speed of the winding bobbin.

The device is further characterised by the factl i Claims. (Cl. 242-158)that known means are provided in order to modify thev ratio between themobile equipment velocity and the rotation velocity of the bobbin.

The device is further characterised by the fact that known means areprovided in order to modify the ratio ybetween the velocity of themechanism provided with the thread-guide and the displacement speed ofthe mobile equipment and therefore the rotation velocity of the bobbin.

The device is still further characterised by the fact that special meansare provided for automatically stopping the motion of the mobileequipment, when it has reached the end of its active course, viz. whenthe bobbin has been completely lled, these means being also used, whenthis has taken place, to bring back the mobile equipment to thebeginning of its active course for the winding up of a new bobbin.

In the annexed drawings there is illustrated. by way of example, apreferred embodiment of the invention:

Figures 1 and 2 show external sideV views, at right angles to eachother, of the machine provided with the device according to theinvention; Figure 3 shows a plan view of the machine, partly in full andpartly in horizontal section along plane IIL-ill of Figures 1 and'Z;Fig. 4 shows a partial section along plane IV-IV of Fig. 3; Fig.

V5 represents a schematical partial section along plane V-V of Fig. 3.Fig. 6 shows a schematical partial section along plane V-V of Fig. 3AFig. i represents, on a largerscale, a partial schematical section alongplane VII- VH of Fig. 3 and Figuresfrom 8 to l12, show, still, on alarger scale, respectively a plan view in the direction of arrow VIII,the sections IX-X, XX, XI-XI and the view from below of section XII-XIIof Fig. 7 for the group illustrated in that figure.

The main shaft l of the machine is operated from motor 2 by means ofpulleys 3 and 4 and a belt B. On shaft l are mounted, longitudinallyslidable by means of keyways li, the friction discs ii, one for eachbobbin foreseen on the machine, and on the hub of disc 6, by means ofball-bearing "l, is mounted the end 8 of arm 5l ending in a cross-piecelil toothed on top as a rack, which slides on aguiding surface Il of themachine frame and `engaging a toothed wheel l2 carried by shaft i3connected to head lil provided with a 'handle i5 which operates thesuccessive positions, in axial direction, of friction disc 6, by means'of the click device i6 and shell shaped disc Il. The friction disc Scooperates with anotherv frction'disc I8, mounted on shaft I9 of bobbin2t. These details are repeated for each bobbin foreseen on the machineso that only the mechanism cooperating with one of the bobbins will bedescribed.

On shaft |9 is mounted an helical gear 2| which engages helical gear 22mounted on shaft 23. On one side of the latter is mounted pinion 24engaging pinion 25 which operates shaft 26 at the end of which, inside aliftable lid 21 and by means of nut 28 is mounted thepini'on 29. r-Jhelatterengages pinion 33, also mounted, by means of nut 3|, on shaft 32which, at the other end, carries the helical gear 33 engaging helicalgear 34 mounted on vertical shaft 35, theoperation of which will bedescribed later on. vAt the other end, shaft 23 carries the Ypinion 33'which by engaging pinionwl',V l`Cf 1lia-tes shaft 38, which, by meansof the helicaljgear operates helical gear 43 mounted on shaft-343|, theoperation of which will be describedlate'r on.

Shafts 35 and`4| are ,parallel to each other and are supportedbybearings fitted abovevandbelow `onfa fixed support-42 of the machine;Vshaft 35 has 'a threadedpor'tion 43 and shaft 4| hasa longitudinalgroove A44; on said shafts is mounted a mobileequipment, particularlyillustrated by Figures 7 and Yl2. VSaid mobile equipment consists of a'tubular element 45 which, with the Aend sleeves r46 and 47, is sldablymounted on the external diameter-of thread 43; at vtop and bottom endsof the tubular element '45 are mounted the hubs 48 of arms 49. Above toparm 49, freely Vrotatable on shaft 4|, is mounted the cross-piece 50,which, urged by spring carried by'arm 49, has a tendency to rotate inthe direction of arrow '52, so 'that the semicylindrical end 53 threadedon its internalsurface rengages `thread 43 of shaft 35.y B y acting, Vatany moment,V on extension 54 of cross-piece v5u in the direction ofarrow 55, it willfbe possible to disengage, at will, the mobile'equipment from the thread 43.

A pinion 53 is mounted on the lower arm '49 Vand by'means of key 51engages groove 44 of shaft 4|` and vis driven by it; Vpinion'56 engagespinion 58"'m'ounted on shaft: 53, supported for rotation by top "andbottomifalrms 49 and having two threadsi and 'Blfwith opposedinclinations convenientlyijoined at the top and at .the bottom Vin 52and 63.

Inside said grooves iseng'aged the end of aprovlonged button 65introduced into the cylindrical .cavity 6 S`vf arider |61 and kepttherein by a Vsetvscrew SS.. ',Button`j`65 `is freely rotatable `aroundits axis, inside cavity 66. 'Iherider '61 is 'provided with the smallrodg'which passes .at the exterior of tubular element 4,5 thus hinderingthe rotation of element E1; uitisaflsoprovided Awith thread v guide X19,

It Inustbe observed that, on top, shaft 35 has a'portion 7| of adiameter corresponding to that of the threaded bottom of screw 43. On anuprightpiece 'l2 of the machinegis'mounted by means of pivot 13a,rocking double lever 14,

which, at one end is loaded fwith an adjustable Vyarn will pass fromparafn .roller '|6 to thread guide '|0.

The operation of the device-is as follows:

The bobbins will rotateatan angular velocity depending on the gearratioadopted for pulleys ,Y v43jand 4 used and depending also on ltheregulaity which is a function ofthe rotation velocity of thelcobbin-carrying shaft.

The rotation of the shaft 35 is such that the mobile equipment; throughthe engagement of thesemicollar 53 with thread 43, displaces itselfgradually, at-a-constant speed, in the direction of :arrow l. Thismotion will take place till the momentin which semicollar 53 arrives atthe top portion 1| Aof shaft 35; then, the disengagement 'of the mobileequipment from shaft 35 will take place and the mobile equipment willstop. This will happen, when the whole bobbin will have Vbeen wound up.

vAt the same time, the .rotation of shaft 4|, through pinions 56 and 53will causethe'continnous-rotation of shaft 53` and rider 3l willlaccomplish alternating motions by the cooperationl of nger andthedouble thread 63, 5|; the amplitude of these alternating runs willcorrespond to the truncated cone portion of the'bobbin.

During the winding 'up of a truncated cone layer on the bobbin and inconsideration of the fact that the bobbin rotates at aconstant angularspeedftheconditions of the winding up ofthe .yarn are continuouslyVvariable; in spite of this, the winding up will take placerin a perfectmannerand under a regular tension of the yarn, be-

cause owing to the presence of the parain roller 76, the disposition,taken by the yarn, is continuously variable viz. v it causes acontinuous variation of `frictional resistance of the yarn onthread-guide 1G, softhat the portion of yarn going from thread-guide 1E!to the bcbbin is substantially `:submitted always to the same tension.Thisis due to the pendularoscillations made by arm 'lli-on pivot 'I3 andbythe different-direction of the thread-guide 'm in relation with theparaf- `inroller 'i5 during each alternate-runof threadguide' 73.

iFrom what has been said above it results that bythe use of `thedevice-according to the invention, a perfect vhomogeneity of winding upis attained, that'the bobbin'canrotate-at a higher lor-lower speedaccording to the count of the yarn to be wound up, that the rotationspeed of the bobbin controls also the motion speeds of the other partsof the-device, that the lifting speed of the mobile equipment inthedirection of arrow 79 can'be adjustedin relationvwith the count of theyarn to wind up, by changing the pinions 29,

fand lastly that, owing to the fact that by the elimination of all thecauses which compelled to keep a' very low speed when winding up coarse'counts of yarn in the known devices, by the device Iaccording to theinvention, it is possible `to use very high winding'speeds and,therefore, to exploitat the utmostthe production of the machine. Lastly,the motion of the thread-guide 70 being perfectly and mechanicallyoperated, as well inthe ralternating runs, as inthe general motion ofthe lifting of the mobile equipment,

the winding will be done in the most perfect conceivable manner.

Moreover the device is self disengaging Awhen the bobbin is completelywound up.

Although, for descriptive reasons, thev present invention is based onwhat has been described and illustrated only by way of an example, manypractical modifications can be made to the vembodiment of theinvention,all based, though, on the fundamental conceptions of the invention,covered in the following claims.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I

declare that what I claim is:

1. In a lbobbin Winder having an upright bobbin spindle, drive means anda variable speed transmission between the drive-means and spindle, theprovision of a yarn distributing device comprising two vertical shafts,gear means connecting each shaft for rotation with the bobbin at a,speed Which is a function of the speed of the bobbin, the first shaftbeing externally threaded and the second having a longitudinal groove, ayoke surrounding both shafts and having means releasably engaging thethread of the first shaft thereby to move the yoke longitudinally of theshafts, a vertical screw journalled in the yoke and having opposedintersecting threads with connecting ends, a first gear keyed to thescrew, a second gear journalled in the yoke coaxially with the secondshaft and engaging the first gear, a pin projecting radially inwardlyfrom the second gear to engage in the longitudinal groove to rotate thesecond gear with the second shaft and permit longitudinal movement ofthe yoke, and a thread guide mounted for longitudinal movement on thescrew and including means holding said guide against rotation and meansengaging in the threads of the screw.

2. A device as in claim l wherein the yoke comprises a tubular membersurrounding the rst shaft and having two arms extending therefrom,

the screw being journalled vbetween the` two arms.

3. A device as in claim 1 wherein the gear means comprise replaceablegears for varyingV the speed of rotation of the shafts relatively toeach other. l

4. A device as in claim 1 including a variable friction drive mechanismfor varying the speeds of the gear means relatively to the bobbin.

GIOVANNI BATTISTA CALVI.

REFERENCES CITED The following references are. of record in the file ofthis patent:

UNITED STATES PATENTS

